World number one Roger Federer after his first round victory over Colombia's Alejandro Falla: "I don't solely play for myself. When I play I do play for Switzerland and I do try to be a good ambassador, as I travel for eight months of the year, but it is different having the Swiss cross on your jersey and you do feel the pressure. It's not something that we're used to, everybody talking about it on the street in Switzerland. It only comes every four years so it's unusual and I feel that too. It's a huge deal [to win gold], it would be a massive highlight of my life."

So now Roger knows what Andy has to put up with at Wimbledon - every single year.

Talking about the empty seats at Olympic stadia on BBC Radio 5 live: "Unfortunately there is no test they could do before the event as to who from the accredited personnel is going to go and watch the events. It's now up to the organisers to make sure that the tickets are used. The athletes have to focus on what they have to do and then they can go and watch other sports when either they are knocked out or their event is over."

Talking about the empty seats at Olympic stadia on BBC Radio 5 live: "Unfortunately there is no test they could do before the event as to who from the accredited personnel is going to go and watch the events. It's now up to the organisers to make sure that the tickets are used. The athletes have to focus on what they have to do and then they can go and watch other sports when either they are knocked out or their event is over."